simonwillison.net

Latest posts

• Interactive explanations

  Feb 28, 2026
• Please, please, please stop using passkeys for encrypting user data

  Feb 27, 2026
• An AI agent coding skeptic tries AI agent coding, in excessive detail

  Feb 27, 2026
• Free Claude Max for (large project) open source maintainers

  Feb 27, 2026
• Unicode Explorer using binary search over fetch() HTTP range requests

  Feb 27, 2026
• Hoard things you know how to do

  Feb 26, 2026
• Quoting Andrej Karpathy

  Feb 26, 2026
• Google API Keys Weren't Secrets. But then Gemini Changed the Rules.

  Feb 26, 2026
• Quoting Benedict Evans

  Feb 26, 2026
• tldraw issue: Move tests to closed source repo

  Feb 25, 2026
• Claude Code Remote Control

  Feb 25, 2026
• I vibe coded my dream macOS presentation app

  Feb 25, 2026
• Quoting Kellan Elliott-McCrea

  Feb 25, 2026
• Linear walkthroughs

  Feb 25, 2026
• go-size-analyzer

  Feb 24, 2026
• First run the tests

  Feb 24, 2026
• Ladybird adopts Rust, with help from AI

  Feb 23, 2026
• Writing about Agentic Engineering Patterns

  Feb 23, 2026
• Writing code is cheap now

  Feb 23, 2026
• Quoting Paul Ford

  Feb 23, 2026
• Reply guy

  Feb 23, 2026
• Quoting Summer Yue

  Feb 23, 2026
• Red/green TDD

  Feb 23, 2026
• The Claude C Compiler: What It Reveals About the Future of Software

  Feb 22, 2026
• London Stock Exchange: Raspberry Pi Holdings plc

  Feb 22, 2026
• How I think about Codex

  Feb 22, 2026
• Quoting Thibault Sottiaux

  Feb 21, 2026
• Andrej Karpathy talks about "Claws"

  Feb 21, 2026
• Adding TILs, releases, museums, tools and research to my blog

  Feb 20, 2026
• Taalas serves Llama 3.1 8B at 17,000 tokens/second

  Feb 20, 2026